Machine for fixing shoelace hooks, eyelets, and the like in workpieces



June 5, 1951 v A. il'ZEK MACHINE FOR FIXING SHOELACE! HOOKS, EYELETS AND THE LIKE IN WORKPIECES Filed Jan. l8, 1947 5 Sheets-Sheet l INVENTOR.

W- WOW :ZM'QMQ 79 BY 6 ATTORNEY June 5, 1951 A. i'l'iEK MACHINE FOR FIXING SHOELACE uooxs, EYELETS AND THE LIKE IN WORKPIECES 5 Sheets-Sheet 2 Filed Jan. 18, 1947 June 5, 1951 A. ii'iEK 2,555,623

MACHINE FOR FIXING SHOELACE nooxs, EYELETS AND THE LIKE IN WORKPIECES Filed Jan. 18, 1947 3 Sheets-Sheet 5 awr mw A ffOR/V! y Patented June 5, 1951 M CH N FOR. NG siioEtAcE Hooks, EYELETS, AND THE LIKE IN WORKPIECES Antonin Ziiek, Zlin; Czechoslovakia, assignor to Bata, narodni po'dnik, Zlin, Czechoslovakia Application anemia. .1947, Serial N6. 722312 In Germany March 3, 1942 Section 1, Public Law 690, August 8, 1946 Patent expires March 3, 1962 14 claims. (01. 21s 1"7.12)

This invention relates to a machine for fixing shoe lace hooks, eyelets and the like into two opposite parts of a work-piece, for example into both uppers of a piece of footwear. For brevity such a machine is herein referred to as a doubleacting hook-inserting machine.

The attaching of the shoe lace hooks to the uppers of pieces of footwear has been carried out hitherto predominantly by single acting machines; by means of which the shoe lace hooks are inserted into the individual sides of the uppers one after the other, and are there riveted.

Although this manner of operation is lengthy it isstill preferred to that of double-acting hookinserting machines as hitherto known because the latter are not yet sufficiently developed and therefore, show various shortcomings. Thus, the known double-acting hook-inserting. machines usually operate without a hole punching device, so that the hole required for the insertion of a hook has to be'punched out of the work-piece by the hook shaft itself. In this manner only a thin work=piece material could be punched through, and the punching was notvalways perfect, which caused either stoppages of, operationor defective fixing 'and/or riveting of the shafts of thehooks in the material. For fixing biggerhooks in a stronger material the punching-out of the. hole by the shaft of the hook itself is entirely unsuite, able; one has therefore tried also to punch the;

required holesout of the work-piece on a different machine, and then to use the inserting machine only for the inserting andriveting of the hooks.

In this case, however, difliculties resulted con cerning the accuracy of adjustment of bothj sides of the upper within the working range of the machine in which the hooks were to be inserted into the pre-perforated holes, so that even this pro; ceduredid not give satisfaction. Moreover, the designsof'the double-acting hook-inserting machines as hitherto known are very complicated and, consequently, such machines are expensive.

The present invention provides a double-acting hook-inserting machine which, while being of the utmost simplicity of construction adrnits a con tinuous working operation comprising firstly formingan appropriate aperture by means of a piercing punch and then, on the same spot, inserting and riveting a hook in the said apert ure.

The machine is characterised by a working tongs, both jaws of which are equipped each with a piercing punch for the 'pre-perforation and'with. a'friveting punch for the subsequent insertingand rivetingof the'hooks, the piercingiojn the one hand and the riveting'on the other hand'being" I phases.

sessraierrom thisaid disc andlwhic'hca effected. at will simultaneously on both sides of thework-piece. .1

. Conveniently, the. arrangement, is such that the working tools disposed, on the jaws. of. the, tongs. are alternatively shifted into theoperative position, i. e. transversely acrossthe directionof feed of the work-piece.. Theworkingtools woo operate inthis process advantageously with counter-matrices which may be arranged ,ona. slide .Which .is also movable transversely across the direction of feed of the work-piece simultaneously with thetongs. a Provision is ormay be made forthe feed of the work-piece, to be effected by an automatic feeder device whereas hitherto a lateral movement, of

the piercing or riveting tool head itself was generally used for that purpose. 1 By way of example one form of, a. double-acting, hook-inserting machine according to the invenr tion is shown on the accompanying drawings,

Whereon q l, H I a Fig. l is afront elevation of the machine;

Fig, 2 is a side elevation of the machine;; Fig. 3 is a perspective view of the driving mechanism and working devices of the machine; and i l r. m1 Figs. 4 toll show the positions ofindividual components of the machine in various working In the illustrated machine the driveis effected from a power source. arrangedin themachine; casing I, via abelt drive acting on a belt pulley 2 which is keyed to a clutch shaft 3 and which carries a hand wheel 5. On the left end .Fi g. 3)

- of the shaft 3 there is the driving part} of a;

clutch the driven part of which is desig nedias a double con'e Biixed to a shaft 9 which iscapfable of being' shifted longitudinally and is adapted 'to; be coupled alternatively with the said drivingpa'rt 4 orwitha' brake disc 1 arranged on pra' ket 6, Between the bracket aandthe oubiefc'bhfcj there is a'return spring I ll which urges the (ion 1e. cone, and 'thereby'th whole shaft 9,. towards the: right away from the bracket. A ririglll serves for shifting the shaft 9, this ring being' arrang d] on the shaft and engagedby a forked lever 12 rotatable'about a fixed rion is. The fre'efend; of the fork is equippedwith a follower roller l5. as'shown in Fig. 11 in contact'jfwith a" discv which is rotatable withand freelyfshiftable axially on" the main Shanta and." carries aj'ca'in" njori one side. .On theother ,Sideof ,thedisc isl 'a two-"l ai'fr'ned starterleven l9 having a pawl :20, hich'is. be arny turned'and "is surname akially'onthesha'ft IS. A chain 23 attached to one end of this lever leads to a pedal (not shown) whereas a tension spring ll acts on the other end of the lever. The pawl 20 co-acts with a recess 2! in a stationary sleeve 22 which is fixedly attached to the machine casing and may form a bearing for the shaft l8.

When the starter lever I9 is in the appropriate position the main shaft [3 is driven from the gear wheel l of the clutchshaft 9 via a gear wheel 24 in a pre-determined way as will be hereinafter described.

On the main shaft [8 there are arranged cam discs 30, 33 and 49 for the operation of the individual working devices of the machine.

The most important working device is formed by a working tongs 25 the pivot 25 of which is arranged on a forked arm 27 of a bell crank lever 21, 28 which performs a swivelling motion about a stationary pivot 29. The swivelling motion of the forked arm 21 is controlled by the other arm 28 which is operated through a follower roller 3! by the cam disc 33. The bell crank lever 21, 28 is under the bias of a spring load 32; its swivelling motion causes an up-and-down movement of the Whole of the working tongs 25, The closing and opening movement of the arms of the tongs is effected by the cam disc 33 which presents two cams controlling the movements of said arms. Advantageously the said arms are extend by resiliently mounted levers 34, which are pivoted at 35 to the arms and the free ends of which are connected with one another by a tension spring 38 serving to hold them permanently in contact with the cam disc 33. The opposite ends of the lever 34 are connected, by set screws 36 and compression springs 37, with the arms of the tongs 25. The screws 35 are screwed into the arms, pass freely through openings in the ends of the levers 34 and by their heads form adjustable abutments for the latter to limit the clearance between the levers and the arms of the tongs. Movement of the levers 34 within this clearance is opposed by the comparatively strong compression springs 31. The transmission of force to the tongs 25 when the upper ends of the levers 34 are forced apart by means of the cams of the cam disc 33 is accordingly effected by means of the springs 37 which ensure a resiliency of the closing movement of the tongs; this is very important particularly in view of the unavoidable lack of uniformity and the varying thickness of the material of the work-piece.

In the lower end or jaws of the arms of the tongs the working tools proper are enchangeably and if desired adjustably arranged. These tools are a hollow hole-piercing punch 39 and a riveting punch 40 on each jaw. These working tools 39, 49 co-operate alternatively with corresponding counter-.matrices 43, 4'5 arranged on a slide 4| which is moved ,upand down transversely to the direction of feed of the work-piece substantially simultaneously with the tongs 25. This slide 4! is guided in a stationary guide 42 and in a stationary guide tongue 79 (see also Fig. and is under the bias of a compression spring 43 which tends to hold the slide 4!, through abutment bolt 44 on an end plate 80, in contact with counter-abutment 45 on the forked arm 21. By means of the sprin 43 and the abutment 45 the slide 4| is moved between upper and lower position with the difference in these positions being equal to the distance between the matrices 46, 41. For that purpose the spring 43 bears, on the one hand, against the stationary guide 42 and, on the other hand, against the end plate 80 of the slide 4i which carries the abutment bolts 44. The slide is therefore forced by the spring 43 to take part in the up and down movement of the tongs. A recess 16 (Figs. 3 and '7) provided in the guide 42 receives the punch 39 when the tongs 25 close in the upper position (i. e. during the riveting process).

It would be possible to connect merely flexibly the end plate with forked arm 21, so that the slide 4| would permanently move up and down with the said arm 21. But here another structure will be described in which a temporarily contacting abutment bolt 44 and a counter abutment 45 is used. In this structure the upper position of the slide 4| is independent of the upper position of the abutment 45. The first named position is fixed by a bolt 8i, the inner end of which penetrates into a groove 32 in the slide 4|. In this case the distance between the upper and lower position of the slide 41 can be advantageously much shorter than the distance between the end positions of the arm 21, which means a more simple construction, whereby, furthermore, the difference between the rotative movement of the abutment 45 and the shifting movement of bolt 44 does not matter, provided the movement of abutment 45 away from guide 42 is sufficient to permit full upward movement of abutment 44.

The guide tongue 19 serves at the same time for the guiding of the work-piece, for example the uppers A of apiece of footwear (Figs. 4 to 9), the two parts of which are pushed over the tongue right up to guide ledges 48 (Fig. 5) arranged on the guide 42. Along these guide ledges the uppers are guided during the whole working operation in the position required for the maintenance of equal distance of the hooks to be inserted from the edge of the work-piece.

An automatic feeder device is driven by the cam disc 49 (Fig. 3) which is equipped with a guide track 50 and with a cam 5!. The carrier body 52 of the feeder device swivels about a pivot 56 which is adjustable in a slotted guide 51. The pivot 56 is carried by the forked end 58 of a two-armed lever 59 which is rotatable about a stationary pivot 35 and is adjustable by hand; according to its adjustment (on a scale 52) by means of a handle 6| the length of the feeder stroke is determined, and consequently the distance and/or the pitch of the shoe lace hooks to be inserted on both sides or uppers of the work-piece. The upper part of the carrier body 52 forms a fork 53 with a pivot 54 which is guided in a guide slot 56 and carries on a protruding end a roller 6! engaging the guide track 59 of the cam disc 49. The curvature of the guide track 5|) causes the swivelling movements of the feeder body 52 about the pivot 56, the amplitude of which oscillations can be changed by adjusting the pivot 56 in the guide slot 5?. V

The gripping means proper of the feeder device comprises a clamping tongs 53 the lower ends of the arms of which are equipped with small conical rollers 55 that may be knurled if desired. The opening and closing of the tongs 53 is effected by means of a tension rod 68 guided in a projection 69 which rod carries at its lower end a lock head 10 with guide grooves ll for the operating arms of the tongs and is equipped at its upper end with a roller 72 abutting against the cam disc 49. Under the bias of a compression spring 13 the rod 68 and its follower roller are kept permanently in contact with the cam disc. Attached to the spring abutment collar 14 on the rod 68 is a tension chain 15 which can be pulled down by means of a pedal (not shown). Downward movement of the rod 68 either by means of the tension chain l or due to the roller 12 engaging the cam 5i of the cam disc 49, opens the jaws of the tongs 53; otherwise these jaws are kept closed by the force of the spring l3.

The main shaft is also drives a hook feeder device of any desired type. The hooks are fed from a supply hopper indicated at 85 through a rotary feed means 86 shown generally in Figs. 1 and 2. The hooks are delivered by rotary feed means to the locus of operation for effecting the fastening thereof with respect to the workpieces.

The described machine allows of an advantageous arrangement of a mirror l8 (Fig. 2) in the neighbourhood of the working range of the tong whereby convenient observation of the WOrkiIlg procedure can be had even on the side of the work-piece averted from the operator.

The method of operating the machine is as follows:

The operator presses first the pedal (not shown) operating the tension chain '15, and thereby opens the jaws of the clamping tongs 53 of the feeder device. Between the opened jaws he puts both sides of the uppers A (Figs. l to 9) which are pushed over the guide tongue it right up to the ledge .8 of the guide body t2 (Figs. 5 and 9) in such a manner that the guide tongue 19 lies between the two sides of the uppers A. Next the said pedal is released whereupon the work-piece is clamped between the small rollers 55 of the tongs 53 under the bias of the spring 13.

Prior to starting the machine the working tongs 25 is in the position shown in Figs. 3 and 5, i. e. the jaws of the working tongs are opened and are in such a position that the piercing punches 39 come to lie over the working spot which in Fig. 5 is defined by the axis 3-18, and the slide ll carrying the hole-matrix as is opposite the said punches in the appropriate position.

After the uppers A have been clamped by the rollers 55 of the tongs 53 the machine is set in motion by depressing the pedal that operates the tension chain 23 (Fig. 3) whereupon the starter lever I9 is turned about the shaft 58 against the tension of spring ll far enough for the pawl 25} to come opposite the recess 2| of the stationary bearing sleeve 22. Under the action of the spring 54 through the forked lever l2 pivoting about the fixed pivot l3, the pawl 26 then drops into the recess 2|, the components 2, 9, Hi and II performing at the same time a shifting movement towards the right hand side so that the double cone it engages the driving part of the clutch and is consequently set into rotation. Through the toothed gearing ill, 2:1 the main shaft [8 of the machine is thus rotated. On Fig. 3 the distance of the double cone 8 from the clutch part t i exaggerated for the reason of a better understanding, but in reality this distance can be, for instance, 2 mm. only.

Rotation of the main shaft [8 causes first the two cams of the cam disc 33 to force the operating arms 34 of the working tongs 25 apart, whereby the jaws of the tongs are closed and apertures are punched out of the work-piece from both sides by means of the piercing punches 39. The punched-out piece of material enter the bores of the piercing punches from where they drop out in the further course of the process at the opposite ends of the piercing punches.

After the punching out of the apertures in the work-piece the jaws of the working tongs 25 are opened again and at the same time the tongs is shifted upwards (Fig. 3) until the riveting punches 40 come to lie over the working position B-B (Fig. 7). The shifting of the tongs 25 is effected by the action of the cam disc 30 on the lever arm 28, which is tilted in the direction of the arrow S1 (Fig. 3) whereby the forked arm 2i swings the pivot 26 of the tongs in the direction S2. In this upward movement of the arm 2! the slide t! too is shifted upward at the same T time under the action of the spring 43. Accordingly, the riveting punches do as well as the counter-matrix 4'! of the slide 4! arrive in the working position BB (Fig. 7).

During this upward movement of the working tongs 25 hooks H (Fig. 6) are fed to the punchedout apertures in the work-piece by means of a hook feeder device. These hooks reach the working position engaged for example on a supporting plate 0 (Figs. 6 and 7) which forms a component of the hook feeder device.

At the moment when the hooks to be riveted, and likewise the riveting punches 4t and the riveting matrices 31 have assumed the working position the jaw of the tongs 25 are closed again under the action of the cams of the cam disc 33, whereby the hooks are inserted into the punchedout apertures in the work-piece by the action of the riveting punch ii] and the shafts of the hooks are riveted or burred over on the riveting matrix il. It is clear that by this construction the riveting punches it) only press the hooks, which are brought and held by the supporting plates C.

During thi riveting process the earn 5! 0f the cam disc i9 comes to bear against the follower roller 52 and presses the rod 63 down whereby the jaws of the clamping tongs 53 are opened and the rollers 55 release the work-piece. While the tongs 53 are held open by the cam 5| the carrier body 52 of the feeder device is tilted about the pivot 56 in the direction of the arrow S3 under the action of the guide track 5t of the cam disc 49, and after reaching the right hand. end position, the cam til again leaves the follower roller 12 whereby the jaws of the tongs 53, are closed againunder the action of the spring l3 and the work-piece is again gripped by means. of the rollers 55 (Fig. 6). Thus, while the hooks were being upset, the clamping tongs 53 was shifted from the position shown in Figs. 1 and 4 into the position shown in Fig. 6, that is, from a position remote from the jaws 25 to a position.- closer to them.

While the clamping rollers 55 are thus being shifted, the riveting of the hook shafts is finished and the hooks are thus firmly secured in the uppers. The jaws of the working tongs 25 are then again opened by means of the cam disc 33 and the spring 38 and the said tongs returned into the original position shown in Fig. 5. ihe pivot 26 is also moved back by means of spring 32 attached to the arm 28, and at the same time the slide 4 I is moved to its initial position. While the tongs 25 are opened the work-piece which is clamped between the rollers of the clamping tongs 53 is pulled one feed step corresponding to the pitch of the hooks under the action of the guide track 58 of the cam disc 4% (opposite to the direction of the arrow S3 of Fig. 3) so that the work-pieceA too comes into a new working position (Fig. 8).

Fig. 8 shows a sequence of the movements of the clamping rollers 55 of the feeder device. From the original position marked I the rollers 55 pass (in an open condition) during the riveting process via the position II into the position III in which the rollers 55 again grip the workpiece, and return via the position IV (in a clamped position and together with the Workpiece) into the original position I.

If in a work-piece several hooks are to be fastened in a row one after the other without interruption of operation, the operator holds the pedal controlling the starter lever depressed condition whereby the working process as described is repeated until the operator releases the pedal again. In this case the pawl 20, shown more clearly in Fig. '11, remains in the recess 2| and the disc it rotates with the shaft l8 and shifts forward and backward on the same in the free space between the follower roller [5 and the left hand side of the pawl 29, whereby the said roller [5 and the other elements connected thereto remain in their right hand position, whereby the clutch 4-8 is engaged and the clutch shaft t rotates.

Releasing the pedal after one or more revolutions of shaft l8 causes an automatic turningback of the starter lever 19 under the action of the spring Ti, and a shifting-out of the pawl 29 from the recess 2| to the left side, thereby pushing the cam disc it towards the left (Fig. 3). Prior to the completion of a working revolution of the main shaft is once it has been initiated, the cam 17 of the disc it arrives in front of the follower roller iii of the forked lever I2 and, because disc I 6 is now held by pawl 20 from movement to the right, shifts, by means of the ring II, the clutch shaft 9 together with the double cone 8 also to the left whereby the latter is first disengaged from the clutch disc 4 and is then pressed against the brake disc I against which consequently any further rotation of the machine is braked off, since until cam l1 comes around to force roller i5 to the left, disc 16 will merely rotate in the space between roller i 5 and pawl 20.

It is clear that if the operator desires that but only one revolution of the shaft [8 should be made, he must hold the respective pedal in depressed position only until the clutch 8, 9 is engaged.

The operator can take off the finished Workpiece from the machine after opening the jaws of the clamping tongs 53, and insert a new workpiece.

The working tongs 25 (arranged transversely across the direction of feed of the work-piece), the ends of which carry the tools 39, 49, are bent laterally as shown in Figs. 1 and 3 to enable, in conjunction with the above mentioned arrangement of a back mirror 78, unhampered observation of the working process.

Iclaim:

1. In a double-acting hook-inserting machine, especially for footwear, the combination of a working tongs having a pair of jaws, movable about a common and movable pivot point, a perforating punch and a riveting punch carried fast by each of the jaws of the tongs, said punches cooperating with counter-matrices, whereby each of the operations of perforatin a work-piece and of riveting hooks in the perforations can be performed on two work-pieces simultaneously, and mechanism for operating the tongs.

2. In a double-acting hook-inserting machine,

i9 ina especially for footwear, the combination of a working tongs having a pair of jaws, movable about a common and movable pivot point, a perforating punch and a riveting punch carried fast by each of the jaws of the tongs, said punches cooperating with counter-matrices, whereby each of the operations of perforating a work-piece and of riveting hooks in the perforations can be performed on two Work-pieces simultaneously, and mechanism for intermittently feeding the Workpiece between the jaws of the tongs, opening and closing the said jaws and shifting the tongs transversely to the direction of feed of the Workpiece.

-3. In a double-acting hook-inserting machine, especially for footwear, the combination of a working tongs having a pair of jaws, movable about a common and movable pivot point, a perforating punch and a riveting punch carried fast by each of the jaws of the tongs, said punches cooperating with counter-matrices, whereby each of the operations of perforating a work-piece and of riveting hooks in the perforations can be performed on two work-pieces simultaneously; mechanism for intermittently feeding the work-piece between the jaws of the tongs, opening and closing the said jaws and shifting the tongs transversely to the direction of feed of the work-piece, a slide movable simultaneously with the said transverse movements of the tongs, and counter matrices on said slide to co-act with said punches.

4. A machine as set forth in claim 2, including a bell crank lever mounted for swivelling motion about a stationary pivot, and means pivoting the tongs on said lever, whereby the common pivotal point of the tongs is arranged on an arm of the said bell crank lever.

5. A machine as set forth in claim 3, including a bell crank lever mounted for swivelling motion about a stationary pivot, and means pivoting the tongs on said lever, whereby the common pivotal point of the tongs is arranged on an arm of the said bell crank lever.

6. A machine as set forth in claim 1, said mechanism including a cam disc for controlling the opening and closing of the jaws of the tongs.

'2. A machine as set forth in claim 2, said mechanism including a cam disc for controlling the opening and closing of the jaws of the tongs.

8. A machine as set forth in claim 3, said mechanism including a cam disc for controlling the opening and closing of the jaws of the tongs.

9. A machine as set forth in claim 1, including two two-armed resiliently mounted levers forming extensions of the tongs, each lever being pivoted to the back end of the tongs and the back ends of the levers being connected one with another by a tension spring, and a cam disc rotatable between said levers to control the opening and closing movements of the jaws of the tongs.

10. A machine as set forth in claim 2, including two two-armed resiliently mounted levers forming extensions of the tongs, each lever being pivoted to the back end of the tongs and the back ends of the levers being connected one with another by a tension spring, and a cam disc rotatable between said levers to control the opening and closing movements of the jaws of the tongs.

11. A machine as set forth in claim 3, including two two-armed resiliently mounted levers forming extensions of the tongs, each lever-being piv oted to the back end of the tongs and the back ends of the levers being connected one with an other by a tension spring, and a cam disc rotatable between said levers to control the opening and closing movements of the jaws of the tongs.

12. A machine as set forth in claim 2, said mechanism including a clamping tongs connected with a carrier body, swivelling about an adjustable pivot, means for adjusting the pivot, governing means for moving the carrier body with the clamping tongs about said pivot to efiect the feed of the work-piece, and means for opening and closing the jaws of the clamping tongs.

13. A machine as set forth in claim 3, said mechanism including a clamping tongs con nected with a carrier body, swivelling about an adjustable pivot, means for adjusting the pivot,

governing means for moving the carrier body with 1 the clamping tongs about said pivot to effect the feed of the work-piece, and means for opening and closing the jaws of the clamping tongs.

14. A machine as set forth in claim 3, said mechanism including a clamping tongs connected with a carrier body, swivelling about an adjustable pivot, means for adjusting the pivot, governing means for moving the carrier body with the clamping tongs about said pivot to effect the feed of the work-piece, and means for opening and closing the jaws of the clamping tongs only during return or non-feed movements of the said tongs about said pivot.

ANTONiN ZiZEK.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,136,166 Prime Apr. 20, 1915 1,141,775 Coombs June 1, 1915 1,260,260 Harmon Mar. 19, 1818 1,381,180 Grlass June 14, 1921 1,824,957 Jacques Sept. 29, 1931 

